Model output

We ask for a NetCdf file which contains:


All data should be given on your model's own vertical grid and timestep, unless you run with a timestep shorter than 10 minutes, in which case please submit 10-minute averages.

If you have problems in generating netcdf files please contact us.

Filename

The filename should be composed as:

dice_scm_<institute>_<model>_<stageX>_<ver>_<lsmX>.nc

where
<institute> name or acronym of your institute
<model> acronym of your model
<stageX> stage of the intercomparison ("stage1b", "stage2", etc)
<ver> version of your submission (v10, v11, etc)
<lsmX> For stage 3 only include the LSM number from the driver file
(ie _scm01 for simulation driven by LSM model 01, etc)

Note: Spaces and underscores are not allowed in these strings.

example: dice_scm_meto_ga4.0_v1.nc
or for stage 3: dice_scm_meto_ga4.0_v1_lsm03.nc

Global attributes

All relevant meta information should be added to the file as global attributes. This should include:

General:

reference to the model
contact person.
type of model where the SCM is derived from (climate model, mesoscale weather prediction model, regional model) ?
time step

Turbulence scheme:

Turbulence scheme  (e.g., K profile, TKE-l, EDMF ...)
Formulation of eddy diffusivity K.
Formulation of massflux, if used.
For E-l and Louis-type scheme: give formulation for length scale.
For K-profile: how is this  profile determined ? (e.g., based on Richardson, Brunt-Vaisala frequency (N^2),  Parcel method, other)

Surface boundary condition in stage 1:

For the momentum surface boundary condition did you use the specified u* directly or use it to specify the surface drag coefficient? Or something else?

and more:

Any other model specific aspects you find relevent for this intercomparison.

Any deviation from the prescribed set up that you had to make because of the specific structure of your model.

Initial profiles

Include the initial profiles in the mean state section as the first time step at 0 seconds.

Here we assume that the model is in eta coordinates and has a specific structure in the use of full levels and half level. If your model differs in this respect please adapt the output to fit with your model.

Sign convention

Surface energy fluxes (shf, lhf, g) are positive when directed away from the surface. Surface radiation fluxes (qdw, qup, ldw, lup) are all positive.

NetCdf dimensions and variables

Variables and dimensions should have the names as specified below between curled brackets (all lower case) . Exclude the curled brackets from the name.

Each variable should have an attribute "units" with the unit prescribed as below between brackets. Exclude the brackets from the unit.

Each variable should have an attribute "long_name" which explains the meaning of the variable. The exact formulation is free, but could be taken from the description below. If a variable is not available for your model, use the attribute _FillValue to prescribe the numerical value that defines not available.

All physical variables should be of type float

Dimensions:

{time} output times
{levf} full levels
{levh} half levels
{levs} soil levels

Variables:

Time series output {time}

{time} in seconds since 19 UTC on October 23rd 1999 [s]
{lwdw} long wave downward radiation at surface [W/m2]
{lwup} long wave upward radiation at surface [W/m2]
{swdw} short wave downward radiation at surface [W/m2]
{swup} short wave upward radiation at surface [W/m2]
{shf} sensible heat flux [W/m2]
{lhf} latent heat flux [W/m2]
{ustar} friction velocity [m/s]
{rain} rainfall rate [mm/day]
{psurf} surface pressure [Pa]
{hpbl} boundary layer height [m]
{t2m} 2m temperature [K] Not used in uncoupled simulations
{q2m} 2m specific humidity [kg/kg] Not used in uncoupled simulations
{u10m} 10m u-component wind [m/s] Not used in uncoupled simulations
{v10m} 10m v-component wind [m/s] Not used in uncoupled simulations
{cc} total cloudcover fraction [0 1]

4. Mean state {time} {levf}
{zf} height of full level [m]
{pf} pressure at full level [Pa]
{t} temperature [K]
{th} potential temperature [K]
{q} specific humidity [kg/kg]
{u} zonal component wind [m/s]
{v} meridional component wind [m/s]

5. Prescribed forcings {time} ({levf} or {levh})
{ugeo} u-component geostrophic wind [m/s]
{vgeo} v-component geostrophic wind [m/s]
{dudt_ls} u-component momentum advection [m/s/s]
{dvdt_ls} v-component momentum advection [m/s/s]
{dtdt_ls} temperature advection [K/s]
{dqdt_ls} moisture advection [kg/kg/s]
{w} vertical movement [m/s]

6. Fluxes and increments {time} ({levf} or {levh})
{zh} height of half level [m]
{ph} pressure at half level [Pa]
{wt} vertical temperature flux [Km/s]
{wq} vertical moisture flux [kg/kg m/s]
{uw} vertical flux u-component momentum [m2/s2]
{vw} vertical flux v-component momentum [m2/s2]
{Km} eddy diffusivity momentum [m2/s]
{Kh} eddy diffusivity heat [m2/s]
{mf} massflux [kg/m2/s]
{dT_dt_rad} temperature tendency from radiation [K/s]
{TKE} turbulent kinetic energy [m^2/s^2]
{shear} shear production [m2/s3]
{buoy} buoyancy production [m2/s3]
{trans} total transport [m2/s3]
{dissi} dissipation [m2/s3]